31320439505 has 16 divisors (see below), whose sum is σ = 38606492160. Its totient is φ = 24375258432.

The previous prime is 31320439483. The next prime is 31320439531. The reversal of 31320439505 is 50593402313.

It is a cyclic number.

It is not a de Polignac number, because 31320439505 - 2³⁰ = 30246697681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1811612 + ... + 1828818.

It is an arithmetic number, because the mean of its divisors is an integer number (2412905760).

Almost surely, 2^31320439505 is an apocalyptic number.

It is an amenable number.

31320439505 is a deficient number, since it is larger than the sum of its proper divisors (7286052655).

31320439505 is a wasteful number, since it uses less digits than its factorization.

31320439505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27088.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 31320439505 in words is "thirty-one billion, three hundred twenty million, four hundred thirty-nine thousand, five hundred five".